You need to provide a valid collateral for this loan if you want it to be fulfilled.
Can you signed a message from an address posted 3+ months ago?
I do not know how to sign a message from bitcoin adresses but as you can see, these adresses are mine and they're active.
You need to address the question as to what your collateral will be.
As well, it would be useful to know the following:
How do you plan to repay the loan?
What do you need the loan for?